Description

Sort an array using a user-defined comparison function

usort(data, comparison)

Parameters

• data (array) — An array to be sorted
• comparison (ref|function_call) — A comparison function. The function must return a number less than, equal to, or greater than zero if the first argument is considered to be respectively less than, equal to, or greater than the second

Return Value

• boolean — Always returns true

Usage Example

import sorting
 
data = [
    {age: 20, name: "clara"},
    {age: 22, name: "vania"},
    {age: 18, name: "sarah"},
    {age: 17, name: "aisha"},
    {age: 18, name: "nifa"},
    {age: 19, name: "lisa"},
]
 
usort(data, mycompare())
 
function mycompare(a, b)
    ' Compare a.age & b.age first, and then compare a.name & b.name
    ' if both ages are equal
 
    c = compare(a.age, b.age)
 
    if c == 0
        return compare(a.name, b.name)
    else
        return c
    endif
stop

Documentation version: 1.0.16. Updated on: 14 July 2025.
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